libvirt users - Jul 2020 - no/empty NUMA cells on domain XML

Hi ,

I'm looking for a possibility to simulate a VM (to be used as a host)
reporting no or empty NUMA <cells> in 'virsh capabilities'.
'virsh
capabilities' usually reports single NUMA in the VMs,
like
<numa>
<cell id='0' cpus='0-63' memory='16777216'
unit='KiB'/>
</numa>

I appreciate if someone could advise

Thank you
Polina
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://listman.redhat.com/archives/libvirt-users/attachments/20200701/efe57df9/attachment.htm>

On Wed, Jul 01, 2020 at 12:08:35PM +0300, Polina Agranat
wrote:
> Hi ,
> 
> I'm looking for a possibility to simulate a VM (to be used as a host)
> reporting no or empty NUMA <cells> in 'virsh capabilities'.
'virsh
> capabilities' usually reports single NUMA in the VMs,
> like
> <numa>
> <cell id='0' cpus='0-63' memory='16777216'
unit='KiB'/>
> </numa>
If the "host" doesn't report any NUMA topology, the libvirt will
always
synthesize a single NUMA cell. So there is no scenario in which the
<numa> info will be empty with current generation libvirt.

Regards,
Daniel
-- 
|: https://berrange.com      -o-    https://www.flickr.com/photos/dberrange :|
|: https://libvirt.org         -o-            https://fstop138.berrange.com :|
|: https://entangle-photo.org    -o-    https://www.instagram.com/dberrange :|

Thank you, Daniel, for the response.

Polina

On Wed, Jul 1, 2020 at 12:34 PM Daniel P. Berrangé <berrange@redhat.com>
wrote:
> On Wed, Jul 01, 2020 at 12:08:35PM +0300, Polina Agranat wrote:
> > Hi ,
> >
> > I'm looking for a possibility to simulate a VM (to be used as a
host)
> > reporting no or empty NUMA <cells> in 'virsh
capabilities'. 'virsh
> > capabilities' usually reports single NUMA in the VMs,
> > like
> > <numa>
> > <cell id='0' cpus='0-63' memory='16777216'
unit='KiB'/>
> > </numa>
>
> If the "host" doesn't report any NUMA topology, the libvirt
will always
> synthesize a single NUMA cell. So there is no scenario in which the
> <numa> info will be empty with current generation libvirt.
>
> Regards,
> Daniel
> --
> |: https://berrange.com      -o-
> https://www.flickr.com/photos/dberrange :|
> |: https://libvirt.org         -o-
> https://fstop138.berrange.com :|
> |: https://entangle-photo.org    -o-
> https://www.instagram.com/dberrange :|
>
>